Bathymetric Surveying on River Trent
Published on by Natalie Taylor-Clarke
High-resolution River Trent survey supports Grand Union Canal Transfer, enabling water security planning with accurate terrain, bathymetric and ecological data.
Strategic Surveying to Support Water Security
As part of a Strategic Resource Option (SRO) under the Water Resources National Framework, we’ve completed a high-resolution River Trent survey in support of the Grand Union Canal Transfer. Working on behalf of AECOM, and in partnership with Affinity Water, Severn Trent, and the Canal & River Trust, this effort is a key step in a major initiative to move up to 115 million litres of surplus treated water per day from Birmingham to the South East via 131km of canal infrastructure.
The wider scheme will upgrade existing canal assets, while introducing new pipelines and pumping stations to maintain reliable delivery into water-stressed regions. Ensuring minimal ecological impact is a core priority. Our survey data directly informed hydraulic modelling, used to predict changes in flow velocity and depth—crucial variables in assessing risks to aquatic habitats and known barriers to fish migration.
Precision Mapping Across Key Locations
Initially commissioned in 2022, we were tasked with producing 3D terrain models of several locations along both the River Tame and the River Trent. These models underpinned early feasibility and environmental studies. Due to the value of the initial results, we were reappointed in August 2023 to conduct an extended River Trent survey across additional locations.
We utilised a blended methodology to ensure comprehensive and accurate data capture. For main channels, hydrographic echosounders mounted on vessels delivered bathymetric depth readings. In shallow or low-flow areas, manual pole-based surveys were conducted. Terrain data was collected at one-metre intervals at weir sites and five-metre intervals elsewhere. In areas with restricted access, drone and total station surveys were employed in parallel.
Delivering CAD outputs and 3D models incrementally allowed AECOM to align modelling with project milestones, ensuring progress met tight regulatory deadlines. The result: a robust dataset supporting environmental stewardship and the delivery of a vital national infrastructure project.
“Survey Solutions won the original tender based on their flexibility and ability to meet our timescales. I’ve been particularly impressed by their ability to adapt their surveying methodologies according to site conditions and requirements. The team are always very reliable and readily available to assist us when we need them. I wouldn’t hesitate to recommend them.”
Technical Director, Water Resources
